From: "wcohen at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug runtime/31074] On aarch64 the systemtap.base/set_kernel.stp triggers "Unable to handle kernel paging request"
Date: Fri, 01 Dec 2023 14:51:52 +0000 [thread overview]
Message-ID: <bug-31074-6586-JytaxM8wil@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-31074-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=31074
--- Comment #5 from William Cohen <wcohen at redhat dot com> ---
I have done some addition investigation using diagnostic print statements to
runtime/linux/stp_tracepoint.c. The tracepoint_table[0] is getting corrupted.
The lower 4 bytes of that entry are being zeroed.
The problem is linked to the:
set_kernel_string(addr, "foobar")
The interesting thing is that the set_kernel_string_n() functions later in the
test do not have an issue, but they use the same underlying code. If the len
passed in is set to a value greater than 508 then the set_kernel_string_n()
will cause a similar corruption. So it appears that issue is happening
_stp_store_deref_string.
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next prev parent reply other threads:[~2023-12-01 14:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-17 17:13 [Bug runtime/31074] New: " wcohen at redhat dot com
2023-11-22 0:19 ` [Bug runtime/31074] " fche at redhat dot com
2023-11-22 15:02 ` wcohen at redhat dot com
2023-11-22 15:36 ` fche at redhat dot com
2023-11-27 16:07 ` wcohen at redhat dot com
2023-12-01 14:51 ` wcohen at redhat dot com [this message]
2023-12-01 16:45 ` wcohen at redhat dot com
2023-12-01 17:19 ` mark at klomp dot org
2023-12-04 16:38 ` wcohen at redhat dot com
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